Portion of a luminaire



FIG. 1 is a side perspective view of the new design for a portion of a luminaire;

FIG. 2 is an enlarged detail right side elevational view of FIG. 1 thereof with a portion removed for clarity of illustration;

FIG. 3 is an enlarged detail left side elevational view of FIG. 1 thereof with a portion removed for clarity of illustration;

FIG. 4 is a right end elevational view thereof, the left end view being the same;

FIG. 5 is an enlarged deail bottom plan view of FIG. 1 thereof with a portion removed for clarity of illustration; and,

FIG. 6 is an enlarged detail top plan view of FIG. 1 thereof with a portion removed for clarity of illustration.

The broken line disclosure represents portions of the portion of a luminaire that form no part of the claimed design. 

CLAIM The ornamental design for a portion of a luminaire, as shown and described. 